By Paul Thurrott
While the Windows 8 Release Preview offers an excellent and advisable electronic software distribution (ESD) mechanism that lets you install the product in various ways directly from the web, and do so in a surprisingly efficient manner, your needs may be different. Fortunately, Microsoft also lets you create more traditional install media, using either DVD or a USB device. Here’s how you can do so.

Source: Paul Thurott's SuperSite for Windows